(TXT) View source # 2021-04-26 - Home Made Litmus Test (IMG) Red cabbage pH indicator The red cabbage extract can be used to determine whether substances are acidic or alkaline. The structures of the anthocyanin pigments, which give the red cabbage its colour, are subtly changed at varying pH. These different structures give a range of colours. (HTM) From: https://www.compoundchem.com/2017/05/18/red-cabbage/ tags: article,science # Tags (DIR) article (DIR) science